Nick Mortimer is a geologist with GNS Science. His interests in petrology and tectonics have taken him to all four corners of the submerged continent of Zealandia and to neighbouring Antarctica and Australia. He has participated in a number of scientific voyages plumbing the ocean depths for rock samples and other marine data, and has published extensively on the subject. Nick is the acknowledged expert on the exploration and history of Zealandia. He lives in Dunedin. Dr Hamish Campbell is a geologist with GNS Science and is well-known for his role as 'resident geologist' at the National Museum of New Zealand Te Papa Tongarewa, and as a science communicator. As an author of popular books - including the bestselling In Search of Ancient New Zealand (Penguin, co-authored with Gerard Hutching) - he has raised awareness of Zealandia and its significance. As a palaeontologist, his specialist interests are primarily concerned with fossils and their interpretation in terms of the ancestry and evolution of life on Zealandia. He lives in Wellington.